Win-CodexBar v0.45.3

Added

• Settings: global HTTP proxy for provider traffic (#235, #236).
• Codex tray: reset-credit next expiry on the Reset credits row (count + “Next expires …”; honors Relative reset time) (#241).

Fixed

• Tray icon missing from the taskbar after upgrade (#237, #238).
• Float bar window flipping Settings Auto theme to light (pin WebView2 dark on float bar) (#240).

Changed

• Hosted PR check on Blacksmith Windows (fmt, clippy, tests, frontend build); release packaging remains local.
• Dead-code and helper cleanup (shared SigV4/parse helpers, drop unused CLI args/bridge bindings/icons registry, simplify build scripts).